the amtrak train was headed from oakland to bakersfield. police say that the driver did not yield at the crossing gate and slammed right into the train, pushing at least one of the cars off the tracks. >> how did you not see that the train was crossing? >> i don't know if there was any indications of any use of alcohol or drugs. >> the big rig driver suffered moderate to major injuries. investigators say it is still unclear why he failed to stop. >>> well, it's crunch time for the presidential candidates. they are busy prepping for their first debate. a new washington post poll finds president obama has a two- point nationwide lead over romney. but in two of the swing states, his lead is much wider. nine points in florida and ten points in ohio. with less than 48 hours until the debate, grace lee explains how both sides are racing to lower the expectations. >> reporter: both the obama and romney campaigns are doing their best to lower expectations ahead of wednesday's debate. >> we expected all along that governor romney will have a good ni